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Finding the Fourth Proportional to 1,011.41, 1,394.17 and 887.48

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Solution

The fourth proportional to 1,011.41, 1,394.17 and 887.48 is: 1,223.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,011.41 : 1,394.17 = 887.48 : x
  2. Step 2: Convert to fraction form
    1,011.41/1,394.17 = 887.48/x
  3. Step 3: Cross multiply
    1,011.41x = 1,394.17 × 887.48
  4. Step 4: Simplify right side
    1,011.41x = 1,237,297.99
  5. Step 5: Solve for x
    x = 1,237,297.99/1,011.41
  6. Step 6: Final answer
    x = 1,223.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.